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Below you will find an excerpt from Gradesaver's detailed theme of propaganda.

Propaganda and Duplicity

"Squealer represents a totalitarian government’s propaganda machine. Eloquent to a fault, he can make the animals believe almost anything. This fact is especially clear in Squealer’s interactions with Clover and Muriel. Each time Clover suspects that the Seven Commandments have been changed, Squealer manages to convince her that she is wrong. After the executions, Napoleon abolishes the singing of “Beasts of England” in favor of a new anthem, the lyrics of which contain a promise never to harm Animal Farm. In this propagandist maneuver, Napoleon replaces the revolutionary spirit of “Beasts of England” with the exact opposite, a promise not to rebel. In addition to being a source of manipulation, propaganda is an agent of fear and terror. Orwell demonstrates this quite clearly with Napoleon’s vilification of Snowball and his assurances that Snowball could attack the animals at any minute. He uses similar fear tactics regarding Frederick and Pilkington. The most egregious example of propaganda in the novel is the maxim that replaces the Seven Commandments: “All animals are equal / But some animals are more equal than others.” The idea of “more equal” is mathematically improbable and a nonsensical manipulation of language, but by this time, the animals are too brainwashed to notice."